The number 97709
97709 is a composite number with 4 divisors. Its prime factorisation is 199 × 491. Divisors (4): 1, 199, 491, 97709.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 97709: a semiprime: 199 × 491, the product of two primes.
- 2
97709 is composite. Its prime factorisation is
- 3
The divisors add up to 98400; without 97709 itself that is 691, so 97709 is deficient (691 is less than 97709). Euler's totient φ(97709) = 97020 numbers up to 97709 share no factor with it.
- 4
The digits of 97709 add up to 32, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 159 steps to reach 1.
LaTeX source of the formulas on this page
\[ 97709 = 199 \times 491 \]
97709 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 98400 |
| Euler totient φ(n) | 97020 |
| Square | 9547048681 |
| Cube | 932832579571829 |
| Square root | 312.584389 |
| Digit sum / digital root | 32 / 5 |
| Collatz steps to 1 | 159 |
| Scientific notation | 9.7709 × |
97709 in other forms
| Form | Value |
|---|---|
| In words | ninety-seven thousand seven hundred and nine |
| Binary (base 2) | 10111110110101101 |
| Octal (base 8) | 276655 |
| Hexadecimal (base 16) | 17DAD |
| Base 3 | 11222000212 |
| As time | 97709 seconds = 27 h 8 min 29 s |
Is 97709 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | No (remainder 1) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 2) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 1) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 4) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 5) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 3) | A number is divisible by 7 if double the last digit and subtract it from the rest: the result is a multiple of 7. |
| 8 | No (remainder 5) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 5) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 9) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 7) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 97709 a prime number?
No. 97709 = 199 × 491, so it is divisible by 199.
What are the factors of 97709?
1, 199, 491, 97709.
What is 97709 in binary?
10111110110101101 (hexadecimal 17DAD, octal 276655).
What is the square root of 97709?
About 312.5844.
Is 97709 divisible by 3?
No. Its digits add up to 32, which is not a multiple of 3.
What is special about the number 97709?
97709 is a semiprime: 199 × 491, the product of two primes.